RISC-V ISA Explorer · Cryptography (Zk*)

Zbkb: Crypto Bitmanip

Ratified 2022-02 · version 1.0.1

Rotations, byte packing, and bit reversal used heavily inside cipher and hash implementations.

Typical use: Rotations, pack and byte-reverse for crypto

Open Zbkb in the explorer

Dependencies

Required by

Instructions (16)

Mnemonic	Name	Encoding	Match	Mask
`ANDN`	AND with inverted operand	`0100000----------111-----0110011`	`0x40007033`	`0xfe00707f`
`BREV8`	Reverse bits in bytes	`011010000111-----101-----0010011`	`0x68705013`	`0xfff0707f`
`ORN`	OR with inverted operand	`0100000----------110-----0110011`	`0x40006033`	`0xfe00707f`
`PACK`		`0000100----------100-----0110011`	`0x8004033`	`0xfe00707f`
`PACKH`		`0000100----------111-----0110011`	`0x8007033`	`0xfe00707f`
`PACKW`		`0000100----------100-----0111011`	`0x800403b`	`0xfe00707f`
`REV8.RV32`		`011010011000-----101-----0010011`	`0x69805013`	`0xfff0707f`
`ROL`	Rotate left (Register)	`0110000----------001-----0110011`	`0x60001033`	`0xfe00707f`
`ROLW`	Rotate left word (Register)	`0110000----------001-----0111011`	`0x6000103b`	`0xfe00707f`
`ROR`	Rotate right (Register)	`0110000----------101-----0110011`	`0x60005033`	`0xfe00707f`
`RORI`	Rotate right (Immediate)	`011000-----------101-----0010011`	`0x60005013`	`0xfc00707f`
`RORIW`	Rotate right word (Immediate)	`0110000----------101-----0011011`	`0x6000501b`	`0xfe00707f`
`RORW`	Rotate right word (Register)	`0110000----------101-----0111011`	`0x6000503b`	`0xfe00707f`
`UNZIP`	Bit deinterleave	`000010001111-----101-----0010011`	`0x08f05013`	`0xfff0707f`
`XNOR`	Exclusive NOR	`0100000----------100-----0110011`	`0x40004033`	`0xfe00707f`
`ZIP`	Bit interleave	`000010001111-----001-----0010011`	`0x08f01013`	`0xfff0707f`